Hi,

Interesting -- what are you trying to achieve?

This should help:
The GWT-RPC Wire Protocol - Google Docs
https://docs.google.com/document/d/1eG0YocsYYbNAtivkLtcaiEE5IOF5u4LUol8-LL0TIKU/edit

On Tue, Oct 23, 2018 at 2:47 AM Anastasiya Ruzhanskaya <
[email protected]> wrote:

> Hello everyone!
> I am trying to determine how the person who knows for example all
> necessary function calls and parameters can determine the content of the
> message sent.
> This is an example of the message I am trying to parse
> (I already separated it on some meaningful parts), numbers in braces just
> help to make correspondence between payload and strings:
> 7|
> 0|
> 14|
> (1)https://engine.localdomain/ovirt-engine/webadmin/|  //URL
> (2)E8B2AD24442204349EF795039C3B87E5|   // policy name
> (3)org.ovirt.engine.ui.frontend.gwtservices.GenericApiGWTService| service
> interface
> (4)runMultipleActions| name of the method
> (5)org.ovirt.engine.core.common.action.ActionType/12242454|,
> (6)java.util.ArrayList/4159755760|,
> (7)Z| ( two times)) // bool type
> (8)org.ovirt.engine.core.common.action.ShutdownVmParameters/1694554255|
> (9)org.ovirt.engine.core.compat.Guid/1992968158|
> (10)java.util.UUID/2940008275|
>
> (11)org.ovirt.engine.core.common.action.ActionParametersBase$EndProcedure/1568822488|
> (12)java.util.Collections$EmptyMap/4174664486|
> (13)org.ovirt.engine.core.common.businessentities.VDSStatus/1938301532|
> (14)org.ovirt.engine.core.compat.TransactionScopeOption/1475850853|
> (the following is the payload separated and commented in places where I
> can understand it)
> 1|
> 2|
> 3|
> 4|
> 4|- 4 method parameters
> 5|- first type = ActionType
> 6|- second type = arraylist
> 7|- third type = boolean
> 7|- fourth type = boolean
> 5(actionType)|9 (shutdown)|
> 6(arrayList)|1(??)|
> 8 (shutdown vm parameters, list object)|1|0|0|0|(??)
> 9 (guid, ?)|10(UUID)|J$m4mk9wVi3|MjeP460Xkpb (vm
> uuid)|0|5|0|0|0|11|1|0|6|0|0|0|0|0|0|12|0|-6|13|0|1|0|1|14|2|0|0|0|0|0|
>
>
> Until vm uuid parameter it is kind of clear what is happening, but I still
> wonder what do the parameters 1 and 0 mean in places marked as (??). I
> understand, that there is a method called runMultipleActions and it has
> four parameters. I found in source examples of calling this method
> (ovirt-engine/frontend/webadmin/modules/./frontend/src/test/java/org/ovirt/engine/ui/frontend/FrontendActionTest.java).Then
> I determine types of these parameters. Then the type of action performed (
> I shut down the machine). Then  there should be an ArrayList, which
> contains several objects. I assume that 8(shutdown vm parameters) should
> follow right after 6 (arraylist), but there a "1" which I can't explain.
> Also for shutdown parameters: I see in examples that there are not so many
> boolean parameters in constructor there. Here are four! (1|0|0|0) What do
> they mean? And how can I cope with the left payload?
>
> Thank you in advance for any help!
>
> P.S. Also vm  ids have another format when for example I do the same
> actions from web - ui: c8de3f8e-b45e-4a5b-9fa6-e2693dc158b7. Why this is so?
>

without looking at it, I assume that in gwt-rpc here there is serialization
/ encoding the value (which is later decompressed by the client), whereas
the rest api sends the normal human-readable string. (Someone else might
know better.)


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-- 

GREG SHEREMETA

SENIOR SOFTWARE ENGINEER - TEAM LEAD - RHV UX

Red Hat NA

<https://www.redhat.com/>

[email protected]    IRC: gshereme
<https://red.ht/sig>
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